| Keystone to Sinop | 6,176.33 mi (9,939.84 km) |
| Keystone to Siran | 6,416.42 mi (10,326.23 km) |
| Keystone to Sirnak | 6,673.14 mi (10,739.39 km) |
| Keystone to Sirvan | 6,630.26 mi (10,670.37 km) |
| Keystone to Sivas | 6,351.37 mi (10,221.54 km) |
| Keystone to Sivasli | 6,093.10 mi (9,805.90 km) |
| Keystone to Siverek | 6,535.39 mi (10,517.69 km) |
| Keystone to Sivrice | 6,503.39 mi (10,466.19 km) |
| Keystone to Sivrihisar | 6,134.77 mi (9,872.97 km) |
| Keystone to Sogut | 6,053.37 mi (9,741.96 km) |
| Keystone to Sogutlu | 6,030.81 mi (9,705.66 km) |
| Keystone to Soke | 6,020.13 mi (9,688.47 km) |
| Keystone to Solhan | 6,549.14 mi (10,539.83 km) |
| Keystone to Soma | 5,973.56 mi (9,613.52 km) |
| Keystone to Sorgun | 6,273.52 mi (10,096.25 km) |
